A new strategy to diminish the 4 V voltage plateau of LiNi0.5Mn1.5O4 |
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| Affiliation: | 1. Department of Physics, University of the Free State, Bloemfontein ZA-9300, South Africa;2. Department of Electronic Science, University of Delhi South Campus, New Delhi 110 021, India;3. Department of Electronics, Keshav Mahavidyalaya, University of Delhi 110 034, India;1. GREEnMat/LCIS, Department of Chemistry, B6a, University of Liège, Sart-Tilman, 4000 Liège, Belgium;2. APTIS, Department of Physics, B5a, University of Liège, Sart-Tilman, 4000 Liège, Belgium;3. Chemical Engineering Laboratory, Department of Applied Chemistry, B6a, University of Liège, Sart-Tilman, 4000 Liège, Belgium;1. College of Chemistry, Jilin University, Changchun 130012, China;2. Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People''s Republic of China, Heilongjiang University, Harbin 150080, China |
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| Abstract: | As for spinel LiNi0.5Mn1.5O4, there is 4 V voltage plateau in the charge–discharge profiles. This voltage plateau can be reduced by an annealing process, however it is hard to avoid it completely. In this study, a new strategy of partial substitution for Mn by Mg is applied. There is no 4 V voltage plateau in the charge–discharge profiles of Mg-doped compound LiNi0.5Mn1.45Mg0.05O4. This compound exhibits good electrochemical properties which can be used as cathode material of lithium ion batteries. At 1 C rate, it can deliver a capacity of around 129 mAh g?1 and remain good cycle performance. |
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| Keywords: | A Inorganic compounds B Chemical synthesis C X-ray diffraction D Electrochemical properties |
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